The original version of "M.T.A.," as recorded for a campaign sound truck, is included in the great 10-CD set, "Songs for Political Action," released on Bear Family in 1966 and still widely available. The singer is "an unidentified vocalist -- probably Arnold Steiner [part of a group of singers who performed at O'Brien's rallies]."

The notes say that it was taken from an acetate that is now in the Smithsonian Folkways collection, but it doesn't seem to exist on any Folkways release.